package com.fjzn.detect.aspectj;

import com.alibaba.fastjson.JSON;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.fjzn.detect.common.annotation.Dlog;
import com.fjzn.detect.common.enums.other.LogType;
import com.fjzn.detect.common.enums.other.OperatorType;
import com.fjzn.detect.core.utils.http.ServletUtils;
import com.fjzn.detect.core.utils.ip.IpUtils;
import com.fjzn.detect.service.security.LoginUser;
import com.fjzn.detect.service.utils.SecurityUtils;
import lombok.Data;
import lombok.extern.log4j.Log4j2;
import org.apache.commons.lang3.StringUtils;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.http.HttpMethod;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.HandlerMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;
import java.time.LocalDateTime;
import java.util.Map;

/**
 * 操作日志记录处理
 *
 * @author helloworld
 */
@Log4j2
@Aspect
@Component
public class LogAspect {

    /**
     * 配置织入点
     */
    @Pointcut("@annotation(com.fjzn.detect.common.annotation.Dlog)")
    public void logPointCut() {
    }

    /**
     * 处理完请求后执行
     *
     * @param joinPoint 切点
     */
    @AfterReturning(pointcut = "logPointCut()", returning = "jsonResult")
    public void doAfterReturning(JoinPoint joinPoint, Object jsonResult) {
        handleLog(joinPoint, null, jsonResult);
    }

    /**
     * 拦截异常操作
     *
     * @param joinPoint 切点
     * @param e         异常
     */
    @AfterThrowing(value = "logPointCut()", throwing = "e")
    public void doAfterThrowing(JoinPoint joinPoint, Exception e) {
        handleLog(joinPoint, e, null);
    }

    protected void handleLog(final JoinPoint joinPoint, final Exception e, Object jsonResult) {
        try {
            // 获得注解
            Dlog controllerLog = getAnnotationLog(joinPoint);
            if (controllerLog == null) {
                return;
            }

            // 获取当前的用户
            LoginUser loginUser = SecurityUtils.getLoginUser();

            // *========日志打印=========*//
            LogToString operLog = new LogToString();
            operLog.setStatus("正常");
            // 请求的地址
            String ip = IpUtils.getIpAddr(ServletUtils.getRequest());
            operLog.setOperIp(ip);
            // 返回参数
            operLog.setJsonResult(JSON.toJSONString(jsonResult));

            operLog.setOperUrl(ServletUtils.getRequest().getRequestURI());
            if (loginUser != null) {
                operLog.setOperName(loginUser.getUsername());
            }

            if (e != null) {
                operLog.setStatus("异常");
                operLog.setErrorMsg(StringUtils.substring(e.getMessage(), 0, 2000));
            }
            // 设置方法名称
            String className = joinPoint.getTarget().getClass().getName();
            String methodName = joinPoint.getSignature().getName();
            operLog.setMethod(className + "." + methodName + "()");
            // 设置请求方式
            operLog.setRequestMethod(ServletUtils.getRequest().getMethod());
            // 处理设置注解上的参数
            getControllerMethodDescription(joinPoint, controllerLog, operLog);
            // 保存数据库
            log.info("请求处理日志输出：{}",operLog.toString());
        } catch (Exception exp) {
            // 记录本地异常日志
            log.error("==前置通知异常==");
            log.error("异常信息:{}", exp.getMessage());
            exp.printStackTrace();
        }
    }

    /**
     * 获取注解中对方法的描述信息 用于Controller层注解
     *
     * @param log     日志
     * @param operLog 操作日志
     * @throws Exception
     */
    public void getControllerMethodDescription(JoinPoint joinPoint, Dlog log, LogToString operLog) throws Exception {
        // 设置action动作
        operLog.setLogType(log.logType());
        // 设置标题
        operLog.setTitle(log.title());
        // 设置操作人类别
        operLog.setOperatorType(log.operatorType());
        // 是否需要保存request，参数和值
        if (log.isSaveRequestData()) {
            // 获取参数的信息，传入到数据库中。
            setRequestValue(joinPoint, operLog);
        }
    }

    /**
     * 获取请求的参数，放到log中
     *
     * @param operLog 操作日志
     * @throws Exception 异常
     */
    private void setRequestValue(JoinPoint joinPoint, LogToString operLog) throws Exception {
        String requestMethod = operLog.getRequestMethod();
        if (HttpMethod.PUT.name().equals(requestMethod) || HttpMethod.POST.name().equals(requestMethod)) {
            String params = argsArrayToString(joinPoint.getArgs());
            operLog.setOperParam(StringUtils.substring(params, 0, 2000));
        } else {
            Map<?, ?> paramsMap = (Map<?, ?>) ServletUtils.getRequest().getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
            operLog.setOperParam(StringUtils.substring(paramsMap.toString(), 0, 2000));
        }
    }

    /**
     * 是否存在注解，如果存在就获取
     */
    private Dlog getAnnotationLog(JoinPoint joinPoint) throws Exception {
        Signature signature = joinPoint.getSignature();
        MethodSignature methodSignature = (MethodSignature) signature;
        Method method = methodSignature.getMethod();

        if (method != null) {
            return method.getAnnotation(Dlog.class);
        }
        return null;
    }

    /**
     * 参数拼装
     */
    private String argsArrayToString(Object[] paramsArray) {
        String params = "";
        if (paramsArray != null && paramsArray.length > 0) {
            for (int i = 0; i < paramsArray.length; i++) {
                if (!isFilterObject(paramsArray[i])) {
                    Object jsonObj = JSON.toJSON(paramsArray[i]);
                    params += jsonObj.toString() + " ";
                }
            }
        }
        return params.trim();
    }

    /**
     * 判断是否需要过滤的对象。
     *
     * @param o 对象信息。
     * @return 如果是需要过滤的对象，则返回true；否则返回false。
     */
    public boolean isFilterObject(final Object o) {
        return o instanceof MultipartFile || o instanceof HttpServletRequest || o instanceof HttpServletResponse;
    }

    @Data
    static class LogToString{

        /** 操作模块 */
        private String title;

        /** 业务类型（0其它 1新增 2修改 3删除） */
        private LogType logType;

        /** 请求方法 */
        private String method;

        /** 请求方式 */
        private String requestMethod;

        /** 操作类别（0其它 1后台用户 2手机端用户） */
        private OperatorType operatorType;

        /** 操作人员 */
        private String operName;

        /** 请求url */
        private String operUrl;

        /** 操作地址 */
        private String operIp;

        /** 操作地点 */
        private String operLocation;

        /** 请求参数 */
        private String operParam;

        /** 返回参数 */
        private String jsonResult;

        /** 操作状态（0正常 1异常） */
        private String status;

        /** 错误消息 */
        private String errorMsg;

        /** 操作时间 */
        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        private LocalDateTime operTime;

        @Override
        public String toString() {
            return "LogToString{" +
                    "日志标题='" + title + '\'' +
                    ", 处理类及方法='" + method + '\'' +
                    ", 请求方式='" + requestMethod + '\'' +
                    ", 请求参数='" + operParam + '\'' +
                    ", 返回参数='" + jsonResult + '\'' +
                    ", 操作人员='" + operName + '\'' +
                    ", 操作状态=" + status +
                    ", 类型=" + logType +
                    ", 操作类别=" + operatorType +
                    ", 请求url='" + operUrl + '\'' +
                    ", 操作地址='" + operIp + '\'' +
                    ", 操作地点='" + operLocation + '\'' +
                    ", 错误消息='" + errorMsg + '\'' +
                    ", 操作时间=" + operTime +
                    '}';
        }
    }
}
